A tool hopper for post-tensioned cast-in-place piles

Abstract

The utility model relates to the technical field of construction instruments, disclose a kind of post-inserted reinforcement cast-in-place pile tool formula hopper. Including discharging hopper, positioning pipe is arranged in the necking of discharging hopper lower end, and positioning pipe is vertically arranged in the lower end of discharging hopper. By the trapezoidal cone structure of wide upper narrow lower of discharging hopper, it can ensure that concrete flows smoothly when pouring concrete;Positioning pipe is vertically inserted into the opening end of pile hole during construction, forms rigid constraint, both realizes the accurate positioning of hopper, and can prevent the soil body from falling into during the concrete pouring process, and it is convenient to replace and install the positioning pipe of different specifications, so that the outer diameter and length of installed positioning pipe can adapt to the construction needs of different volume cast-in-place pile. Solve the problem that traditional post-inserted reinforcement method is prone to cause concrete overflow and insufficient concrete quantity, cause environmental pollution;And surface soil is prone to fall into pile hole in reinforcement operation, affect the quality of pile body.

Description

Technical Field

[0001] This utility model belongs to the field of construction equipment technology, specifically, it relates to a tool-type hopper for post-insertion reinforced concrete piles. Background Technology

[0002] Post-insertion cast-in-place piles, as an innovative pile foundation construction technology, hinge on the spatial and temporal separation of concrete pouring and rebar cage insertion. During construction, a long auger drill continuously discharges soil through its auger blades to form the pile hole. A concrete pump then injects high-pressure concrete into the hole, utilizing the principle of "downward pressure and upward flow" to displace residual soil. Before the concrete initially sets, a specialized rebar inserter uses a vibratory hammer to uniformly insert the rebar cage, allowing the cage to effectively encapsulate itself as it sinks under its own weight, working in conjunction with the fluidity of the concrete. This technology breaks through the traditional cast-in-place pile construction model, achieving mud-free discharge and low-noise operation. It is particularly suitable for densely populated urban areas and projects with stringent environmental requirements. The resulting pile quality meets Class I pile standards, significantly improving construction efficiency compared to traditional methods and substantially reducing overall costs, making it a prime example of green building technology.

[0003] However, traditional post-insertion reinforcement technology still has technical bottlenecks: During concrete pouring, an over-pouring height of at least 0.5m is required to ensure pile top quality, but the subsequent reinforcement cage insertion process can lead to concrete overflow of approximately 0.3-0.5m³ / pile, or insufficient pre-pouring concrete due to vibration during insertion, causing environmental pollution. Simultaneously, traditional insertion methods cannot effectively protect the borehole opening, allowing surface soil to easily fall into the pile body during vibration insertion, forming a 0.2-0.5m weak interlayer. These defects not only cause additional concrete consumption but also reduce pile end resistance, making it prone to quality problems such as sonic logging tube blockage and abnormal wave velocity during pile integrity testing.

[0004] Based on this, the present invention proposes a tool-type hopper for post-insertion reinforced concrete piles to solve the problems existing in the prior art. Summary of the Invention

[0005] In view of this, the main purpose of this utility model is to provide a tool-type hopper for post-insertion cast-in-place piles, so as to solve the problems of traditional post-insertion methods, which easily cause concrete overflow at the pile opening and insufficient concrete volume, resulting in environmental pollution; and the problem that surface soil easily falls into the pile hole during the insertion operation, affecting the quality of the pile body.

[0006] To achieve the above objectives, the basic concept of the technical solution adopted by this utility model is as follows:

[0007] A tool-type hopper for post-insertion cast-in-place piles includes a discharge funnel, which is a trapezoidal cone structure that is wider at the top and narrower at the bottom. A discharge pipe is provided at the lower end of the discharge funnel, and a positioning pipe is threadedly connected to the discharge pipe. A positioning ring is provided on the outside of the positioning pipe.

[0008] In a preferred embodiment, the upper inner side of the positioning tube is provided with an internal thread that is threadedly connected to an external thread provided on the discharge tube.

[0009] In a preferred embodiment, a sealing ring is also provided on the outside of the discharge pipe. The sealing ring is movably sleeved on the outside of the discharge pipe and matches the positioning pipe.

[0010] In a preferred embodiment, the outer side of the positioning tube is further provided with an external thread that is threadedly connected to the positioning ring, and the positioning ring is a tapered structure that is wider at the top and narrower at the bottom.

[0011] In a preferred embodiment, at least one positioning ring is provided on the outside of the positioning tube.

[0012] In a preferred embodiment, a rubber sleeve is further fitted on the outside of the positioning ring, and the sleeve is a variable cross-section structure that matches the conical profile of the positioning ring.

[0013] In a preferred embodiment, the inner wall of the sheath is provided with an annular buckle, which is locked to the dovetail groove on the outer surface of the positioning ring.

[0014] In a preferred embodiment, the upper end of the feeding funnel is symmetrically provided with lifting rings.

[0015] Compared with the prior art, this utility model provides a tool-type hopper for post-insertion reinforced concrete piles, which has the following beneficial effects:

[0016] 1. By setting up the feeding funnel and positioning tube, it can be installed at the hole opening during reinforcement insertion to collect the overflowing concrete and prevent concrete spillage from affecting the surrounding environment; at the same time, the feeding funnel adopts a trapezoidal cone structure that is wider at the top and narrower at the bottom, which can facilitate the replenishment of material into the hole when the amount of concrete is insufficient, effectively ensuring the construction procedure of the post-reinforcement cast-in-place pile and ensuring the quality of the pile.

[0017] 2. By setting up the positioning ring and the protective sleeve, the expansion section of the positioning ring can form a mechanical limiting fit with the pile hole opening during installation. This allows for precise three-dimensional centering of the hopper through threaded adjustment, and the wedge-shaped engagement between the conical contraction section and the hole wall creates a rigid constraint system, effectively preventing soil from falling into the hole. At the same time, the double sealing structure forms a seepage barrier, ensuring the stability of the structure and the cleanliness of construction during concrete pouring, material replenishment, and reinforcement insertion.

[0018] 3. The rubber sleeve allows for quick assembly and disassembly through its elastic deformation, and also forms a flexible protective barrier around the pile borehole during concrete pouring, effectively preventing the risk of borehole collapse caused by equipment vibration. Furthermore, its wear-resistant rubber material resists direct concrete erosion, extending the service life of the positioning device. This solves the problems of traditional post-insertion reinforcement methods, such as easy concrete overflow at the pile borehole and insufficient concrete volume leading to environmental pollution; and the risk of surface soil falling into the pile hole during reinforcement insertion, affecting pile quality. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the tool-type hopper for post-insertion reinforced concrete piles of this utility model;

[0021] Figure 2 This is a cross-sectional view of the tool-type hopper for post-insertion reinforced concrete piles according to this utility model;

[0022] Figure 3 This is a top view of the tool-type hopper for post-insertion reinforced concrete piles according to this utility model;

[0023] Figure 4 This is a schematic diagram of the bone positioning tube of this utility model;

[0024] Figure 5 This is a schematic diagram of the positioning ring of this utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the sheath of this utility model;

[0026] Figure 7 This utility model Figure 2 A magnified view of a portion of point A in the middle.

[0027] [Explanation of Key Component Symbols]

[0028] 1. Feeding funnel; 2. Positioning tube; 3. Gradient section; 4. Lifting ring; 5. Positioning ring; 6. Guide slope; 7. Discharge pipe; 8. Guide port; 9. Hopper cavity; 10. Sealing ring; 11. Sheath; 12. Groove; 13. Buckle. Detailed Implementation

[0029] The structure of the tool-type hopper for post-insertion cast-in-place piles will be further described in detail below with reference to the accompanying drawings and embodiments of the present invention.

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments as described in this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0033] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 9 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0034] The following is combined Figures 1 to 7 This invention describes the structure of the tool-type hopper for post-insertion reinforced concrete piles.

[0035] A tool-type hopper for post-insertion reinforced concrete piles is installed at the borehole opening during the replenishment of post-insertion reinforced concrete and the insertion of reinforcing cages. It guides and constrains the concrete within the hole, preventing overflow and allowing for replenishment when concrete volume is insufficient, thus facilitating the construction of the post-insertion reinforced concrete pile. The hopper includes a discharge funnel 1, which adopts a trapezoidal cone structure that is wider at the top and narrower at the bottom. The flared upper end ensures smooth concrete flow, while the constricted lower end is fitted with a detachable positioning tube 2. The positioning tube 2 is fixed to the discharge port of the discharge funnel 1 via a threaded connection. During construction, it is vertically inserted into the opening of the pile hole, forming a rigid constraint. This achieves precise positioning of the funnel and prevents soil from falling into the borehole during concrete pouring.

[0036] In the above description, during the insertion of the reinforcing cage, a positioning pipe 2 is installed at the lower end of the feeding funnel 1 as needed, and the feeding funnel 1 is hoisted to the borehole opening position. After that, the positioning pipe 2 is adjusted so that it is inserted into the inside of the borehole opening. After the feeding funnel 1 is stably installed, the subsequent insertion of the reinforcing cage begins. During the subsequent insertion of the reinforcing cage, any overflowing concrete caused by vibration is collected in the feeding funnel 1, preventing concrete overflow and environmental pollution. As the reinforcing cage is continuously vibrated and inserted, the concrete level in the feeding funnel 1 gradually drops to the height of the borehole opening (the concrete density increases through continuous vibration), effectively avoiding concrete waste. At the same time, during the insertion of the reinforcing cage, if it is found that the concrete level in the hole drops and is lower than the design pile elevation, material can be added into the hole through the feeding funnel 1 to make the grout elevation reach the design requirements of the pile elevation. In this process, the feeding funnel 1 plays a guiding role.

[0037] In a preferred embodiment, such as Figure 1 , Figure 2 and Figure 3 As shown, the lower inner end of the discharge hopper 1 is provided with an inclined guide slope 6, which is connected to the upper guide port 8 of the lower discharge pipe 7. The guide slope 6 is used to guide the concrete liquid inside the discharge hopper 1 to the positioning pipe 2, thereby preventing the concrete from stagnating on the inner surface of the discharge hopper 1.

[0038] In a preferred embodiment, such as Figure 1 , Figure 2 and Figure 4 As shown, the upper inner side of the positioning tube 2 is provided with an internal thread that connects to the external thread on the discharge pipe 7 at the lower end of the discharge funnel 1, allowing the positioning tube 2 to be detachably installed at the lower end of the discharge funnel 1. This detachable connection allows positioning tubes 2 of different specifications to be installed at the lower end of the discharge pipe 7, ensuring that the outer diameter and length of the installed positioning tube 2 can adapt to the construction requirements of different volume cast-in-place pile borehole diameters.

[0039] In a preferred embodiment, such as Figure 1 and Figure 2 As shown, a sealing ring 10 is also sleeved on the outside of the discharge pipe 7. The sealing ring 10 is movably sleeved on the outside of the discharge pipe 7 and is used in conjunction with the positioning pipe 2. The sealing ring 10 is movably sleeved on the outer wall of the discharge pipe 7 in a clearance fit manner to form an adaptively adjustable sealing interface. This makes it convenient to limit the positioning pipe 2 during use by using the sealing ring 10. Through the interference fit between the elastic sealing ring 10 and the inner wall of the positioning pipe 2, an annular sealing strip is constructed on the outer edge of the concrete conveying channel, which effectively prevents the slurry from penetrating into the orifice area.

[0040] In a preferred embodiment, such as Figure 1 , Figure 2 and Figure 4 As shown, the outer side of the positioning tube 2 is also provided with an external thread that connects to the internal thread of the positioning ring 5. The positioning ring 5 is a tapered threaded sleeve structure that is wider at the top and narrower at the bottom, and at least one positioning ring 5 is installed on the outer side of the positioning tube 2. During installation, the expansion section of the positioning ring 5 forms a mechanical limiting fit with the pile hole opening. This achieves precise three-dimensional alignment of the hopper through thread adjustment, and also constructs a rigid constraint system through the wedge-shaped engagement between the tapered contraction section and the hole wall, effectively preventing soil from falling into the hole. At the same time, the double sealing structure forms a seepage barrier, ensuring the structural stability and construction cleanliness throughout the concrete pouring process.

[0041] In a preferred embodiment, such as Figure 1 , Figure 2 , Figure 4 , Figure 6 and Figure 7 As shown, as an auxiliary protective component of the positioning system, a detachable rubber sleeve 11 is also fitted on the outside of the positioning ring 5. The sleeve 11 adopts a variable cross-section design that matches the conical contour of the positioning ring 5, and an annular buckle 13 is provided on the inner wall of the sleeve 11 to form a mechanical interlocking structure with the dovetail groove 12 pre-set on the outer surface of the positioning ring 5. It can be quickly disassembled and assembled through the elastic deformation of the sleeve 11, and can also form a flexible protective barrier for the soil around the pile hole during the insertion of the reinforcing cage, effectively avoiding the risk of hole collapse caused by equipment vibration. At the same time, its wear-resistant rubber material can resist direct erosion by concrete and extend the service life of the positioning device.

[0042] In a preferred embodiment, such as Figure 1 , Figure 2 and Figure 3 As shown, lifting rings 4 are symmetrically welded to the upper end of the feeding hopper 1, which are used to lift the hopper during use.

[0043] The method of using the tool-type hopper for post-insertion reinforced concrete piles described in this utility model includes:

[0044] After the drilling and grouting of the post-insertion cast-in-place pile are completed, a suitable positioning pipe 2 is first selected and assembled according to the hole diameter and the requirements of the grouting concrete. Then, the position of the positioning ring 5 installed on the outside of the positioning pipe 2 is adjusted according to the positioning requirements. The positioning pipe 2, positioning ring 5, and sheath 11 are then pressed into the inside of the borehole opening of the cast-in-place pile together under external pressure, so that the discharge funnel 1 is located outside the borehole opening. Finally, a vibratory hammer is used to lower the reinforcing cage. During the construction of the post-insertion reinforcing cage, the hopper cavity 9 of the discharge funnel 1 is used to collect the concrete, avoiding concrete overflow and environmental pollution. As the reinforcing cage is continuously vibrated and inserted, the concrete level in the discharge funnel 1 gradually drops to the height of the borehole opening, effectively avoiding concrete waste. At the same time, during the insertion of the reinforcing cage, if it is found that the concrete level in the hole drops and is lower than the design pile elevation, material can be added into the hole through the discharge funnel 1 to make the grout level reach the design requirements of the pile elevation. After the reinforcing bars are inserted, a crane is used to pull out the tool-type hopper of the post-inserted reinforcing bar cast-in-place pile to carry out the construction of the next pile position.

[0045] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A tool-type hopper for post-insertion reinforced concrete piles, characterized in that: Includes a feeding funnel (1), which is a trapezoidal cone structure that is wider at the top and narrower at the bottom, and a discharge pipe (7) is provided at the lower end of the feeding funnel (1) at the guide port (8). A positioning pipe (2) is threaded onto the discharge pipe (7), and a positioning ring (5) is provided on the outside of the positioning pipe (2).

2. The tool-type hopper for post-insertion reinforced concrete piles as described in claim 1, characterized in that: The upper inner side of the positioning tube (2) is provided with an internal thread that is threadedly connected to the external thread provided on the discharge tube (7).

3. The tool-type hopper for post-insertion reinforced concrete piles as described in claim 1, characterized in that: A sealing ring (10) is also fitted on the outside of the discharge pipe (7). The sealing ring (10) is movably fitted on the outside of the discharge pipe (7) and matches the positioning pipe (2).

4. The tool-type hopper for post-insertion reinforced concrete piles as described in claim 1, characterized in that: The outer side of the positioning tube (2) is also provided with an external thread that is threaded to the positioning ring (5). The positioning ring (5) is a tapered structure that is wider at the top and narrower at the bottom.

5. The tool-type hopper for post-insertion reinforced concrete piles as described in claim 4, characterized in that: At least one positioning ring (5) is provided on the outside of the positioning tube (2).

6. The tool-type hopper for post-insertion reinforced concrete piles as described in claim 4, characterized in that: The positioning ring (5) is also fitted with a rubber sleeve (11), which is a variable cross-section structure that matches the tapered profile of the positioning ring (5).

7. The tool-type hopper for post-insertion reinforced concrete piles as described in claim 6, characterized in that: The inner wall of the sheath (11) is provided with a buckle (13), which is locked to the dovetail groove (12) on the outer surface of the positioning ring (5).

8. The tool-type hopper for post-insertion reinforced concrete piles as described in claim 1, characterized in that: The upper end of the feeding hopper (1) is also symmetrically provided with lifting rings (4).

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